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I want to install a ubuntu SO on some laptops. This laptops will be used for studens between 12-16 years old, so to avoid problems I would like to start the ubuntu every time from a clear .iso (like in a USB live). In other words thats it that everithing that the studens do won't be saved in the machine. At the same time I need to save some configurations and add some repositoris for the use in this iso (wifi configuration, some programs...). Someone knows if that is possible?

Thankyou

NBB
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    You can store an ISO on a internal drive just like it was an external thumb-drive or CD; then on turning the device on it'll boot the ISO from the actual physical disk, however the type of file that is booted is RO with changes saved as COW/copy-on-write (in RAM) meaning nothing on disk is changed. You can even have multiple type ISOs on the disk & have grub boot and used to select which you'll boot & use. You've provided no specific architecture/OS/release details, and I'm unsure what you mean by Ubuntu SO? (did you mean OS?) – guiverc Jul 08 '22 at 10:41
  • The standard way would be to create non-admin accounts for the students. The students would be able to save files in their home folder, but won't be able to modify the system or install anything. – user68186 Jul 08 '22 at 12:27
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    There's also overlayroot, so user changes from your customized base system can be easily deleted anytime without needing to re-image. – user535733 Jul 08 '22 at 13:30
  • I wonder if this is an XY Question. The real problem seems to be easy fleet management and security with untrusted users. There are lots of possible solutions to that, among which "start with a clear .iso" is one alternative. – user535733 Jul 08 '22 at 15:16
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    A Guest Account may be what you want, you can put it on USB. https://askubuntu.com/a/1223764/43926 – C.S.Cameron Jul 08 '22 at 15:22

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